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Blockchain
A public, shared database of transactions that nobody owns. Records are chained and immutable, verified by a network of computers, not one central authority.
Category: BasicsRelated terms
Bitcoin (BTC)
A decentralized digital asset with a hard supply cap of 21 million, often called digital gold.
L1 / L2
L1 is a base blockchain (Bitcoin, Ethereum). L2 is a layer on top of it that makes transactions faster and cheaper.
Gas fee
A fee paid to the network to execute a transaction or contract. It fluctuates with network congestion.